#21FDEE
Closest named color: Bright Aqua (#0BF9EA). oklch(89.7% 0.153 187.1), rgb(33, 253, 238).
Aa
Black text reads best on this color (16.34:1).
About this color
#21FDEE is a light, vivid teal or cyan. In OKLCH its lightness is 90%, its chroma 0.153 and its hue 187°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Aqua (#0BF9EA), ΔE 0.012 away. Black text reads best on it, at 16.34:1.
| Hue family | Teals and cyans |
| Lightness | light (90%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Bright Aqua (#0BF9EA) |
| Black text | 16.34:1 |
| White text | 1.28:1 |
Values
| HEX | #21FDEE |
| RGB | rgb(33, 253, 238) |
| HSL | hsl(176, 98%, 56%) |
| OKLCH | oklch(89.7% 0.153 187.1) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #21FDEE | 1.28:1 | Fails | Lc -15.6 | Dividers and decoration only |
| Black text on #21FDEE | 16.34:1 | AAA | Lc 90.1 | Preferred for body text |
| #21FDEE text on white | 1.28:1 | Fails | Lc 13.5 | Not readable |
| #21FDEE text on black | 16.34:1 | AAA | Lc -90.4 | Preferred for body text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 200.
-
Step 50
50
#E3FCF8
oklch(97.2% 0.027 185.2)
-
Step 100
100
#BFF7F0
oklch(93.6% 0.057 186.8)
-
Step 200
200 (this color)
#21FDEE
oklch(89.7% 0.153 187.1)
-
Step 300
300
#00DDD0
oklch(80.8% 0.141 187.3)
-
Step 400
400
#00B9AD
oklch(70.7% 0.124 186.6)
-
Step 500
500
#009E95
oklch(63% 0.11 187.7)
-
Step 600
600
#00857D
oklch(55.5% 0.097 187.4)
-
Step 700
700
#007069
oklch(49.1% 0.086 187.3)
-
Step 800
800
#005C56
oklch(42.8% 0.075 187.1)
-
Step 900
900
#004D47
oklch(37.8% 0.066 185.9)
-
Step 950
950
#002E2A
oklch(27.1% 0.048 185.8)
#21FDEE with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #EFEEEE | 0.163 |
| Deuteranopia (no green cones) | #D4DBF0 | 0.153 |
| Tritanopia (no blue cones) | #00FFF8 | 0.013 |
| Achromatopsia (no color) | #E3E3E3 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21FDEE
#21FDEE
oklch(89.7% 0.153 187.1)
- #FFCED6
#FFCED6
oklch(89.6% 0.056 7.3)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #21FDEE, closest first.
No curated palette has a color within ΔE 0.04 of #21FDEE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Aqua #0BF9EA ΔE 0.012
- Bright Turquoise #0FFEF9 ΔE 0.015
- Cyan #00FFFF ΔE 0.022
- Bright Cyan #41FDFE ΔE 0.026
- Bright Light Blue #26F7FD ΔE 0.031
- Aquamarine #7FFFD4 ΔE 0.053
- Light Turquoise #7EF4CC ΔE 0.054
- Bright Teal #01F9C6 ΔE 0.054
Use #21FDEE in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.